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Question 31
A
N28 
B
N12 
C
N16 
D
N24 
Explanation.
Share Answer Energy consumed = power x time = lvt = 2 x 250 x 6hr = 300 wh = 3 kwh but 1 kwh = N4
3 kwh = 3 x N4 = N 12

Correct Option:
B

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Question 32
A
Low presssure and low p.d 
B
low pressure and high p.d 
C
high pressure an low p.d 
D
high pressure and high p.d 
Explanation.
Share Answer Under high potential difference and low pressure gases are good conductor of electricity

Correct Option:
B

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Question 33
A
500 J 
B
50 J 
C
133 J 
D
250 J 
Explanation.
Share Answer Effective inductance
(1)/L = (1)/4 + (1)/8 = (3)/8
L = (8)/3
Energy stored = (1)/2 LI2
= (1)/2 x (8)/3 x 10 x 10 = (400)/3 = 133.3 J

Correct Option:
C




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Question 37
A
saturation 
B
bonding 
C
amplification 
D
dopping 
Explanation.
Share Answer

No official Explanation yet!


Correct Option:
D

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Question 38
A
8.58 x 10-19
B
8.50 x 10-15
C
8.58 x 10-17
D
8.85 x 10-18 
Explanation.
Share Answer Work function, w = hfo 6.6 x 10-34 x 1.3 x 1015
= 8.58 x 10-19

Correct Option:
A

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Question 39
A
X is the anode and very high current is used 
B
X is the anode and Y is the cathode 
C
Y is the cathode and X is the anode 
D
Y is the anode and very high current is used 
Explanation.
Share Answer Metals and hydrogen are deposited at the cathode, while non-metals and oxygen are deposited on the anode
metals Y will form the anode which is deposited at the cathode made of x

Correct Option:
D

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Question 40
A
14.0 N 
B
10.0 N 
C
12.0 N 
D
13.0 N 
Explanation.
Share Answer The resultant, R is given by pythagoras rule, R2 = P2 + Q2
= 62 + 82 = 36 + 64 = 100
R = 100 = 10.0N

Correct Option:
B

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