Q1PhysicsUnit 12: Current Electricity
In the circuit shown, the heat produced in resistor is 10 calorie/sec. The heat
produced/sec in resistor will be :
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Syllabus context
Part of Current Electricity in JEE Main Physics.
- Electric current: drift velocity, mobility and their relation with electric current
- Ohm's law, electrical resistance, I-V characteristics of Ohmic and non-ohmic conductors
- Electrical energy and power, electrical resistivity and conductivity
- Series and parallel combinations of resistors, temperature dependence of resistance
- Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel
- Kirchhoff's laws and their applications, Wheatstone bridge, Metre Bridge
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Q2PhysicsUnit 12: Current Electricity
Q Type your question-
and of fixed emf, the resistor has
fixed resistance and the resistance of
resistor can be varied (but is
always nonzero). Then the electric power
delivered to the resistor of resistance
is independent of the value of
resistance
Reason
f potential difference across a fixed
resistance is unchanged, the power delivered to the resistor remains
constant.
Q3PhysicsUnit 12: Current Electricity
The most important safety method used for protecting home appliances from short circuiting or overloading is
Q4PhysicsUnit 12: Current Electricity
The electrical energy in kilowatt hours consumed in operating ten
bulbs for 10 hrs/day in a month of
30 days is
Q5PhysicsUnit 12: Current Electricity
The Joules heating effect for an electric heater in and in D.C. circuit is
Q6PhysicsUnit 12: Current Electricity
The heat developed in a system is proportional to the current through it.
Then
Q7PhysicsUnit 12: Current Electricity
A heater coil is cut into two equal parts
and only one part is now used in the heater. The heat generated will now be:
Q8PhysicsUnit 12: Current Electricity
is applied when
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