A cell of internal resistance 0.01Ω can be measured accurately using the
Ohm meter
metre bridge
potentiometer
electroscope
Correct answer is C
No explanation has been provided for this answer.
4.55 x 103V
4.55 x 102V
9.10 x 101V
4.55 x 101V
Correct answer is A
When a charged particle is accelerated across a region of p.d. V Volt, the work done is the product of the charge Q and the p.d. V
i.e. Work done = Q x V
But this work done is equal to the K.E. imparted to the charge given by K.E = 1/2MV2, where V is the velocity of the charge = Q x V = 1/2MV2
∴ p.d V = (1/2MV2)/Q
= 1/2 x 9.1-31 x [4 x 107]2/1.6 x 10-19
= 8 x 9.1 x 102/1.6
= 4550V
= 4.55 x 103V
0.3m
3.0m
3.5m
4.0m
Correct answer is B
V = 72m
U = Magnification = 24
But Magnification = V/U
∴ 24 = 72/U
U = 72/24
U = 3.0m
E/B
EB
B/E
E - B
Correct answer is A
No explanation has been provided for this answer.
8V
10V
12V
16V
Correct answer is C
Net e.m.f = (8 x 2) - (2 x 2)