1
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
Kirchhoff's first rule $$\Sigma$$I = 0 and second rule $$\Sigma$$IR = $$\Sigma$$E (where the symbols have their usual meanings) are respectively based on -
A
conservation of momentum and conservation of charge
B
conservation of energy, conservation of charge
C
conservation of charge, conservation of momentum
D
conservation of charge, conservation of energy
2
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
The electric power consumed by a 220 V $$-$$ 100 W bulb when operated at 110 V is
A
25 W
B
30 W
C
35 W
D
45 W
3
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
Which of the following has negative temperature coefficient of resistivity?
A
metal
B
metal and semiconductor
C
semiconductor
D
metal and alloy
4
CBSE 12th Physics (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+0.77
-0
Two wires carrying currents I1 and I2 lie, one slightly above the other, in a horizontal plane as shown in figure. The region of vertically upward strongest magnetic field is

A
I
B
II
C
III
D
IV
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