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
2.0 * 106 NC -1
2. 5 * 106 NC -1
1.0 * 107 NC -1
4.0 * 107 NC -1
Correct answer is B
v = E*d, => E = v/d
i.e E 107/4 = 2.5 * 106 NC-1