1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
In a certain region of space with volume 0.2 m3, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is :
A
0.5 N/C
B
1 N/C
C
5 N/C
D
zero
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The Brewster's angle ib for an interface should be :
A
30$$^\circ $$ < ib< 45$$^\circ $$
B
45$$^\circ $$ < ib< 90$$^\circ $$
C
ib = 90$$^\circ $$
D
0$$^\circ $$ < ib< 30$$^\circ $$
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The increase in the width of the depletion region in a p-n junction diode is due to :
A
reverse bias only
B
both forward bias and reverse bias
C
increase in forward current
D
forward bias only
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A spherical conductor of radius 10 cm has a charge of 3.2 $$ \times $$ 10-7 C distributed uniformly. That is the magnetude of electric field at a point 15 cm from the centre of the sphere?
$$\left( {{1 \over {4\pi {\varepsilon _0}}} = 9 \times {{10}^9}N{m^2}/{c^2}} \right)$$
A
1.28 $$ \times $$ 105 N/C
B
1.28 $$ \times $$ 106 N/C
C
1.28 $$ \times $$ 107 N/C
D
1.28 $$ \times $$ 104 N/C
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