JEE Physics - MCQ Practice Questions
Physics is where JEE ranks are usually won or lost, since a single conceptual slip changes the whole answer. Questions here span mechanics, rotational motion, thermodynamics, waves and oscillations, electrostatics, current electricity, magnetism, optics, and modern physics. Numerical problems carry full derivations so you can see which step you skipped, not just which option was right.
863 questions | 100% Free
A wire of length L and cross-sectional area A has resistivity ρ. If the wire is stretched to double its length, what will be the new resistance?
A battery with EMF E and internal resistance r is connected to an external resistance R. What is the terminal voltage?
A potentiometer wire of length 100 cm has resistance 10Ω. A standard cell of EMF 1.5V is balanced at 40 cm. What is the EMF of an unknown cell if balanced at 65 cm?
In a circuit, the current through a 10Ω resistor is 2A. If this resistor is replaced by 5Ω, and the rest of the circuit remains unchanged, the new current will be:
A uniform wire of length L is cut into n equal parts. When connected in parallel, the equivalent resistance is:
If the length of a conductor is doubled and the diameter is also doubled, what happens to its resistance?
A 60W bulb and a 100W bulb are connected in series across a 200V supply. Which bulb glows brighter?
An ammeter has a low resistance and a voltmeter has a high resistance. This is because:
Three cells of EMF 2V, 4V, and 3V with negligible internal resistance are connected in series, opposing each other. Net EMF is:
A 100Ω resistor and a 200Ω resistor are connected in parallel, and this combination is in series with a 50Ω resistor. Total resistance is:
A wire of length L and cross-sectional area A has resistivity ρ. If the wire is stretched to 2L without change in volume, what will be its new resistance?
In a Wheatstone bridge, if P/Q = R/S, then the current through the galvanometer is:
A cell of EMF E and internal resistance r is connected to an external resistance R. The terminal voltage V is given by:
A potentiometer wire of length 100 cm has resistance 10Ω. A standard cell of EMF 1.5V is balanced at 60 cm. What is the EMF of unknown cell if it balances at 80 cm?
A nichrome wire and a copper wire of same length and area are connected in series. Which experiences greater heat dissipation?
In a meter bridge experiment, the null point is obtained at 40 cm from the left end. If the left resistance is 8Ω, what is the right resistance?
A battery of EMF 10V supplies current to a circuit. If the voltage across external resistance is 9V, what is the internal resistance if external resistance is 90Ω?
In a circuit with capacitors, which quantity is continuous across the capacitor?
Which of the following shows non-ohmic behavior?
In Joule heating, if voltage is doubled and resistance is halved, the power dissipated becomes: