Alternating Current Test

Question 1
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A) : Capacitor blocks dc and allows ac to pass.

Reason (R): Capacitive reactance is inversely proportional to frequency.

A
A. Both A and R are true and R is the correct explanation of A

B
B. Both A and R are true but R is NOT the correct explanation of A

C
C. A is true but R is false

D
D. A is false and R is true

Question 2
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Both ac and dc can be measured by hot wire instrument.

Reason (R): Hot wire instrument is based on the principal of magnetic effect of current.

A
A. Both A and R are true and R is the correct explanation of A

B
B. Both A and R are true but R is NOT the correct explanation of A

C
C. A is true but R is false

D
D. A is false and R is true

Question 3
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): At resonance, the current becomes minimum in a series LCR circuit.

Reason (R): At resonance, voltage and current are out of phase in a series LCR circuit.

A
A. Both A and R are true and R is the correct explanation of A

B
B. Both A and R are true but R is NOT the correct explanation of A

C
C. A is true but R is false

D
D. A is false and R is true

Question 4
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Quality factor of a series LCR circuit is Q =

Reason (R): As bandwidth decreases, Q increases in a resonant LCR circuit.

A
A. Both A and R are true and R is the correct explanation of A

B
B. Both A and R are true but R is NOT the correct explanation of A

C
C. A is true but R is false

D
D. A is false and R is true

Question 5
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): An alternator is a machine which converts mechanical energy into electrical energy.

Reason (R): When a coil rotates in a magnetic field an e.m.f. is induced in it.

A
A. Both A and R are true and R is the correct explanation of A

B
B. Both A and R are true but R is NOT the correct explanation of A

C
C. A is true but R is false

D
D. A is false and R is true

Question 6
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): A step-up transformer converts input low AC voltage to output high AC voltage.

Reason (R): It violate the law of conservation of energy.

A
A. Both A and R are true and R is the correct explanation of A

B
B. Both A and R are true but R is NOT the correct explanation of A

C
C. A is true but R is false

D
D. A is false and R is true

Question 7
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.

Reason: The inductive reactance increases as the frequency of ac source decreases.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 8
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: When capacitive reactance is smaller than the inductive reactance in LCR current, e.m.f. leads the current .

Reason: The phase angle is the angle between the alternating e.m.f. and alternating current of the circuit.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 9
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: If the frequency of alternating current in an ac circuit consisting of an inductance coil is increased then current gets decreased.

Reason: The current is inversely proportional to frequency of alternating current.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 10
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: An alternating current does not show any magnetic effect.

Reason: Alternating current varies with time.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 11
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: ac is more dangerous than dc

Reason: Frequency of ac is dangerous for human body.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 12
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: The division are equally marked on the scale of ac ammeter.

Reason: Heat produced is directly proportional to the current.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 13
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: An inductance and a resistance are connected in series with an ac circuit. In this circuit the current and the potential difference across the resistance lag behind potential difference across the inductance by an angle p/2.

Reason: In LR circuit voltage leads the current by phase angle which depends on the value of inductance and resistance both.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 14
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.

Reason: Capacitive reactance decrease with increase in capacitance of capacitor.

A
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C
C. If assertion is true but reason is false.

D
D. If the assertion and reason both are false.

Question 15
1 / -0

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion: Current through a pure inductor is wattless.

Reason: Phase difference between emf across a pure inductor and current through it is 90^o or π/2

A
A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion

B
B. If both Assertion & Reasons are true but the reason is not the correct explanation of the assertion

C
C. If Assertion is a true statement but the reason is false

D
D. If both Assertion and Reason are false statements

Submit Test

Alternating Cur...

Question 1

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is NOT the correct explanation of A

C. A is true but R is false

D. A is false and R is true

Question 2

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is NOT the correct explanation of A

C. A is true but R is false

D. A is false and R is true

Question 3

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is NOT the correct explanation of A

C. A is true but R is false

D. A is false and R is true

Question 4

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is NOT the correct explanation of A

C. A is true but R is false

D. A is false and R is true

Question 5

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is NOT the correct explanation of A

C. A is true but R is false

D. A is false and R is true

Question 6

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is NOT the correct explanation of A

C. A is true but R is false

D. A is false and R is true

Question 7

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 8

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 9

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 10

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 11

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 12

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 13

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 14

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.

B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

C. If assertion is true but reason is false.

D. If the assertion and reason both are false.

Question 15

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion

B. If both Assertion & Reasons are true but the reason is not the correct explanation of the assertion

C. If Assertion is a true statement but the reason is false

D. If both Assertion and Reason are false statements

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Question Analysis

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