Current Electricity Test

Result

Current Electricity Test - 22

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Weekly Quiz Competition

Question 1
4 / -1

If the ammeter in the given circuit reads 2A, the resistance R is

A
1 Ω

B
2 Ω

C
3 Ω

D
4 Ω

Solution
Question 2
4 / -1

A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be

A
2 volt

B
3 volt

C
1 volt

D
15 volt

Solution
Question 3
4 / -1

Resistances n, each of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohm, equal to

A
n² R

B
R/n²

C
R/n

D
n/R
Question 4
4 / -1

In the circuit Fig. E = 6.0 V, R₁ = 100 Ω, R₂ = R₃ 50Ω, R₄ = 75Ω. The equivalent resistance of the circuit in ohm, is

A
11.875

B
26.31

C
118.75

D
none of these

Solution
Question 5
4 / -1

A uniform wire of resistance 36 ohm is bent in the form of a circle. The effective resistance across the points A and B is

A
5Ω

B
6 Ω

C
7.2 Ω

D
30 Ω

Solution
Question 6
4 / -1

In, the given circuit R₁ = 20 Ω, R₂ = 40 Ω, R₃ = 60 Ω, R₄ = 180 Ω, C = 5µF and E = 6 volt. The switch S has been closed for a long time. What is the charge on the capacitor ?

A
zero

B
2.5 µC

C
5 µC

D
10 µC

Solution
Question 7
4 / -1

A part of circuit shown in Fig. the potential difference across A and B is

A
7 V

B
11 V

C
14 V

D
15 V

Solution
Question 8
4 / -1

Voltmeter has a resistance of 20 kΩ. When it is connected in series with a resistance R across a 230 V supply, it reads 200 V. what is the value of R ?

A
2 k Ω

B
3 k Ω

C
4 k Ω

D
1 k Ω

Solution
Question 9
4 / -1

The charge flowing in a conductor varies with time as Q= at – bt², then the current

A
reaches a maximum and then decreases

B
falls to zero after t = a/ 2b

C
changes at the rate of (-2b)

D
will remain constant

Solution
Question 10
4 / -1

Two cells of unequal emfs E₁ and E₂ and internal resistances r₁ and r₂ are joined as shown in fig. V_P and V_Q are the potential at P and Q respectively.

A
The potential difference across both the cells will be equal

B
one cell will continuously supply energy to the other

C
the potential difference across one cell will be greater than its emf.

D

Solution