Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
e/4πԐoGm
e2/Gm2
Gm2/4πԐoe2
e2/4πԐoeGm2
Correct answer is D
Electrostatic force = FE = e2/4λEod2
Gravitational force = FG = GM2/d2
increase
decrease
decrease then increase
remain constant
Correct answer is A
No explanation has been provided for this answer.
In a Daniel cell, the depolarizer, positive and negative electrodes are respectively
copper sulphate, copper and zinc
manganese dioxide, carbon and zinc
sulphuric acid, lead oxide and lead
potassium hydroxide, nickel and iron.
Correct answer is A
In the Daniel cell,
i. Depolarize = CuSO4 solution
ii. Positive electrode = Copper container
iii Negative electrode = zinc rod/plate
280.00
160.00
120.00
140.00
Correct answer is D
Total power in watt = 60*5 + 4*100
= 300 + 400
= 700w
Total power in kilo watt = 700/1000
= 0.7 killo w
Unit of electricity in killo watt-hour
= 0.7 * 20hrs
= 14 okwh
i.e If I kwh costs # 10.00
14kwh = 10.00 * 14 = #140
300.0W
469.0W
133.0W
4.8W
Correct answer is A
Efficiency = power output/power Input
=> 80/100 = power output/1.5 * 250
i.e power output = 1.5*250 *80/100 =300w