Out of the following which one is not the unit of electric potential?
Anonymous Quiz
16%
Volt
32%
Joule/coulomb
38%
Newton/coulomb
14%
N×m/c
Assertion: Insulators do not allow flow of current through themselves. Reason: They have no free charge carries
Anonymous Quiz
47%
Both Assertion and Reason are true and the Reason is correct explanation of the Assertion
35%
Both Assertion and Reason are true but Reason is not the correct explanation of the Assertion
15%
Assertion is true but the Reason is false
3%
Both Assertion and Reason are false
A positively charged particle is relased from rest in a uniform electric field. The electrical potential energy of the charge
Anonymous Quiz
24%
Remains constant because the electrical field is uniform
34%
Increases because the charge moves along the electric field
33%
Decreases because the charge moves along the electric field
9%
Decreases because the charge moves opposite to the electric field
A proton and an electron are placed in a uniform electric field
Anonymous Quiz
41%
The magnitude of the electric forces acting on them will be equal
30%
The electric forces acting on them will be unequal
24%
The magnitude of their accelerations will be unequal
6%
Their accelerations will be equal
Work done in carrying an electron from A to B lying on an equipotential surface of one volt potential is
Anonymous Quiz
17%
1eV
29%
10eV
22%
1 volt
32%
Zero
🥰1
In polar molecules, the centres of positive and negative charges of the molecule do not coincide. The statement is always
Anonymous Quiz
71%
True
29%
False
When a dielectric is introduced between the plates of a parallel plate capacitor
Anonymous Quiz
32%
Increases
29%
Decreases
27%
Remains the same
12%
First increases them decreases
A hollow metal sphere of radius 5cm is charged so that the potential on its surface is 10V . The potential at the centre of the sphere is
Anonymous Quiz
25%
0V
33%
10V
35%
Same as at point 5cm away from the surface
7%
Same as at point 25cm away from the surface
A circular coil of 50 turns and radius 7cm is placed in a uniform magnetic field of 4T normal to yeh plane of the coil. If the current in the coil is 6A to total torque acting on the coil is
Anonymous Quiz
22%
14.78 N
39%
0 N
34%
7.39 N
5%
3.69 N
A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
Anonymous Quiz
18%
Decreases
42%
Remains unchanged
24%
Becomes Infinite
16%
Increases
🥰2
A conductor with a positive charge
Anonymous Quiz
31%
Is always at +ve potential
23%
Is always at zero potential
18%
Is always at -ve potential
28%
May be +ve, zero or -ve potential
A method for charging a conductor without bringing a charged object in contact with it is called
Anonymous Quiz
7%
Electification
22%
Magnetization
50%
Electromagnetic induction
21%
Electrostatic induction
The maximum electric field that a dielectric medium of a capacitor can withstand without breakdown is called its
Anonymous Quiz
21%
Capacitance
28%
Polarization
47%
Dielectric strength
3%
None
If voltage across a bulb rated 220V-100Watt drops by 2.5% of its rated value , the percentage of the road value by which the power would decrease is
Anonymous Quiz
12%
20%
49%
2.5%
34%
5%
5%
10%
A fuse wire with a circular cross- sectional radius of 0.02mm blows with a current of 5A, for what current, another fuse wire made from the same material with across- sectional radius of 0.04mm will blow ?
Anonymous Quiz
23%
14.7A
37%
5A
25%
3A
16%
1.5A
In current electricity, Ohm's law is obeyed by all
Anonymous Quiz
17%
Solids
19%
Liquids
57%
Metals
7%
Gases
If voltage across a bulb rated 220V , 160W drops by 3% of its rated value , the percentage of the rated value by which the power would decrease is
Anonymous Quiz
16%
20%
40%
6%
37%
2.5%
7%
10%
With the increase of temperature, the resistance of a semiconductor
Anonymous Quiz
36%
Decreases
31%
Increases
23%
Remains unchanged
10%
Sometimes increases and sometimes decreases
The accurate measurement of emf can be obtained using
Anonymous Quiz
3%
Multimeter
39%
Voltmeter
45%
Potentiometer
12%
Voltameter