Current Electricity Test

Result

Current Electricity Test - 57

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Weekly Quiz Competition

Question 1
4 / -1

In order to pass 10% of main current through a moving coil galvanometer of 99 ohm, the resistance of the required shunt is

A
9.9 Ω

B
10 Ω

C
11 Ω

D
9 Ω

Solution
Question 2
4 / -1

The potential gradient along the length of a uniform wire is 10 volt/metre . B and C are the two points at 30 cm and 60 cm point on a meter scale fitted along the wire. The potential difference between B and C will be

A
3 volt

B
0.4 volt

C
7 volt

D
4 volt

Solution
Question 3
4 / -1

Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.

A
220 Ω

B
110 Ω

C
55 Ω

D
13.75 Ω

Solution
Question 4
4 / -1

The tangent galvanometer, when connected in series with a standard resistance can be used as

A
An ammeter

B
A voltmeter

C
A wattmeter

D
Both ammeter and voltmeter
Question 5
4 / -1

In Wheatstone\'s bridge P = 9 ohm, Q = 11 ohm, R = 4 ohm and S = 6 ohm. How much resistance must be put in parallel to the resistance S to balance the bridge?

A
24 Ω

B

C
26.4 Ω

D
18.7 Ω

Solution
Question 6
4 / -1

A Daniel cell is balanced on 125 cm length of a potentiometer wire. Now the cell is short-circuited by a resistance 2 ohm and the balance is obtained at 100 cm. The internal resistance of the Daniel cell is

A
0.5 ohm

B
1.5 ohm

C
1.25 ohm

D
4/5 ohm

Solution
Question 7
4 / -1

Sensitivity of potentiometer can be increased by

A
Increasing the e.m.f. of the cell

B
Increasing the length of the potentiometer wire

C
Decreasing the length of the potentiometer wire

D
None of the above

Solution
Question 8
4 / -1

Two resistance R₁ and another R₂of the same material but twice the length and half the thickness are connected in series with a standard battery E of internal resistance r. The balancing point is

A

B

C

D

Solution
Question 9
4 / -1

Potential gradient is defined as

A
Fall of potential per unit length of the wire

B
Fall of potential per unit area of the wire

C
Fall of potential between two ends of the wire

D
Potential at any one end of the wire

Solution
Question 10
4 / -1

In an experiment of meter bridge, a null point is obtained at the centre of the bridge wire. When a resistance of 10 ohm is connected in one gap, the value of resistance in other gap is

A
10 Ω

B
5 Ω

C

D
500 Ω

Solution