Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Two charged spheres of $$-20\mu$$C and $$60\mu$$C are kept at a certain distance. They are touched and kept again at the same distance. What is the ratio of force experienced before and after?

A
1 : 3
B
3 : 1
C
2 : 1
D
1 : 2
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Insulators can be charged by which of the following process?

A
Induction
B
Diverging
C
Friction
D
Heating
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Work done in moving a charge of 25C is 50 J. Calculate potential difference, between two points.

A
0.5 V
B
1 V
C
2 V
D
2.5 V
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

What is the electric field near infinite plane sheet of charge density $$\sigma$$ ?

A
$${\sigma \over {2{\varepsilon _0}}}$$
B
$${{\sigma A} \over {2{\varepsilon _0}}}$$
C
$${\sigma \over {2{\varepsilon _0}A}}$$
D
$${\sigma \over {{\varepsilon _0}}}$$
COMEDK Subjects