Current Electricity Test

Result

Current Electricity Test - 80

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

In the above questions, the resistance between the square faces is

A
3 × 10^–9Ω

B
3 × 10^–7Ω

C
3 × 10^–5Ω

D
3 × 10^–3Ω

Solution
Question 2
4 / -1

When an electrical appliance is switched on, it responds almost immediately, because

A
The electrons in the connecting wires move with the speed of light

B
The electrical signal is carried by electromagnetic waves moving with the speed of light

C
The electrons move with speed which is close to but less than speed of light

D
The electron are stagnant
Question 3
4 / -1

There is a current of 1.344 amp in a copper wire whose area of cross-section normal to the length of the wire is 1 mm²6 . If the number of free electrons per cm³ is 8.4 × 10²² , then the drift velocity would be

A
1.0 mm/sec

B
1.0 m/sec

C
0.1 mm/sec

D
0.01 mm/sec

Solution
Question 4
4 / -1

It is easier to start a car engine on a hot day than on a cold day. This is because the internal resistance of the car battery

A
Decreases with rise in temperature

B
Increases with rise in temperature

C
Decreases with a fall in temperature

D
Does not change with a change in temperature

Solution
Question 5
4 / -1

5 ampere of current is passed through a metallic conductor. The charge flowing in one minute in coulomb will be

A
5

B
12

C
1/12

D
300

Solution
Question 6
4 / -1

An electric wire is connected across a cell of e.m.f. E. The current I is measured by an ammeter of resistance R. According to ohm\'s law

A
E = I²R

B
E = IR

C
E = R/I

D
E = I/R
Question 7
4 / -1

The resistance of a wire at temperatures t° C and 0° C are related by

A

B

C

D
Question 8
4 / -1

An electric wire of length ‘L’ and area of cross-section a has a resistance R ohm. Another wire of the same material having same length and area of cross-section 4a has a resistance of

A
4R

B
R/4

C
R/16

D
16R

Solution
Question 9
4 / -1

For which of the following the resistance decreases on increasing the temperature?

A
Copper

B
Tungsten

C
Germanium

D
Aluminum
Question 10
4 / -1

If n, e, τ and m respectively represent the density, charge relaxation time and mass of the electron, then the resistance of a wire of length l and area of cross-section A will be

A

B

C

D

Solution