Current Electricity Test

Result

Current Electricity Test - 20

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Weekly Quiz Competition

Question 1
4 / -1

In a meter bridge experiment, null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y. If X < Y, then where will be the new position of the null point from the same end, if one decides to, balance a resistance of 4X against Y ?

A
50 cm

B
80 cm

C
40 cm

D
70 cm

Solution
Question 2
4 / -1

A moving coil galvanometer of resistance 100 Ω is used as an ammeter using a resistance 0.1Ω. The maximum deflection current in the galvanometer is 100 μA. Find the minimum current in the circuit so that, the ammeter shows maximum deflection

A
100.1 mA

B
1000.1 mA

C
10.01 mA

D
1.01 mA

Solution
Question 3
4 / -1

A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10 divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1V, the resistance in Ohm's needed to be connected in series with the coil will be

A
10³

B
10⁵

C
99995

D
9995

Solution
Question 4
4 / -1

If an ammeter is to be used in place of a voltmeter, then we must connect with the ammeter a

A
low resistance in parallel

B
high resistance in parallel

C
high resistance in series

D
low resistance is series
Question 5
4 / -1

The current I and voltage V graphs for a given metallic wire at two different temperatures T₁and T₂ are shown in the fig. It is concluded that

A
T₁ > T₂

B
T₁ < T< sub>2

C
T₁ = T₂

D
T₁ = 2T₁
Question 6
4 / -1

As the switch S is closed in the circuit shown in Fig., current passed through it is

A
zero

B
1A

C
2 A

D
1.6 A
Question 7
4 / -1

Variation of current passing through a conductor as the voltage applied across its ends as varied is shown in the adjoining Fig. If the resistance is determined at the points A, B, C and D, we will find that

A
resistance at C and D are equal

B
resistance at B is higher than at A

C
resistance at C is higher than at B

D
none of the above.

Solution
Question 8
4 / -1

A 4 ohm resistance wire is bent through 180^o at its mid point and the two halves are twisted together. Then the resistance is

A
1 Ω

B
2 Ω

C
5 Ω

D
8 Ω

Solution
Question 9
4 / -1

The steady state current in a 2 Ω resistor when the internal resistance of the battery is negligible and the capacitance of the condenser is 0.1 µF is

A
0.6 A

B
0.9 A

C
1.5 A

D
0.3 A

Solution
Question 10
4 / -1

Find the resistance of a circuit between A and B in the Fig. below

A
3 R

B
R/3

C
3R/2

D
2R/3