EASY
12th Odisha Board
IMPORTANT
Earn 100

Do the electrodes in an electrolytic cell have fixed polarity like a battery?

Important Questions on Thermal And Chemical Effects of Electric Current

MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 18
If two electric lamps each of 100 W, 220 V are connected in series to a power supply of 220 V, find the power consumed.
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 19
One ampere of current flowing through a wire produces 60 cal of heat in 15 s. What is the resistance of the wire?
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 20
What is the nature of filament inside a zero watt lamp?
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 21
An electric iron has the marking 880 W and 220 V. Calculate the resistance of wire inside the iron (in Ω).
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 22
A heater coil is cut into two parts and only one of them is used in the heater. What is the ratio of the heat produced by this half coil to that by the original coil?
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 23

Two heater coils made of same material are connected in parallel across the mains. The length and diameter of the wire of one of coils are double that of the other. Which one of them will produce more heat?

 

HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 1
Obtain an expression for the heat developed in a resistor carrying current. Hence, mention Joule's law of heating. Find the amount of heat generated by a 1 kW, 250 V heater when used for 1 hour by connecting it to a 250 V mains.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 2
State Joule's law in connection with the heating effects of electric current. Describe how will you verify them experimentally.