1
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
In a circuit the phase difference between the alternating current and the source voltage is $${\pi \over 2}$$. Which of the following cannot be the elements of the circuit?
A
only C
B
only L
C
L and R
D
L or C
2
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
The electric potential V at any point (x, y, z) is given by V = 3x2 where x is in metres and V in volts. The electric field at the point (1 m, 0, 2m) is -
A
6 V/m along $$-$$x-axis
B
6 V/m along +x-axis
C
1.5 V/m along$$-$$x-axis
D
1.5 V/m along +x-axis
3
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
Which of the diagrams correctly represents the electric field between two charged plates if a neutral conductor is placed in between the plates?
A
B
C
D
4
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
A variable capacitor is connected to a 200 V battery. If its capacitance is changed from 2 $$\mu$$F to X $$\mu$$F, the decrease in energy of the capacitor is 2 $$\times$$ 10$$-$$2 J. The value of X is -
A
1 $$\mu$$F
B
2 $$\mu$$F
C
3 $$\mu$$F
D
4 $$\mu$$F
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