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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
2
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
$${\sigma \over {{\varepsilon _0}}}$$
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

Consider a thin spherical shell of radius R consisting of uniform surface charge density s. The electric field at a point of distance x from its centre and outside the shell is

A
inversely proportional to $$s$$
B
directly proportional to $$x^2$$
C
directly proportional to $$R$$
D
inversely proportional to $$x^2$$
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

A charge of 0.8 C is divided into two charges Q$$_1$$ and Q$$_2$$. These are kept at a separation of 30 cm. The force on Q$$_1$$ is maximum when

A
$$Q_1=Q_2=0.4$$ C
B
$$Q_1 \approx 0.8$$ C, $$Q_2$$ negligible
C
$$Q_1$$ negligible, $$Q_2 \approx 0.8$$ C
D
$$Q_1=0.2$$ C, $$Q_2=0.6$$ C
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