Skip to content

+91 87932 47779

Email Us

Online Support

+91 87932 47779

Email Us At
- vgyanhubpune@gmail.com
- vgyanhubdhule@gmail.com

Menu

Email Us At
- vgyanhubpune@gmail.com
- vgyanhubdhule@gmail.com

Menu

Home
About Us
Courses
Knowledge Base
Events
Testimonials
Contact Us

Home
About Us
Courses
Knowledge Base
Events
Testimonials
Contact Us

Menu

Home
About Us
Courses
Knowledge Base
Events
Testimonials
Contact Us

Try Out Our Free Tests

qUESTIONS

MCQs-PYQs-12th-jee

A 220 volt input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is

MCQs-PYQs-12th-jee

According to phenomenon of mutual inductance

MCQs-PYQs-12th-jee

A short solenoid of radius a, number of turns per unit length n1, and length L is kept coaxially inside a very long solenoid of radius b, number of turns per unit length n2. What is the mutual inductance of the system

MCQs-PYQs-12th-jee

A conducting square frame of side ‘a’ and a long straight wire carrying current I are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity ‘V’. The emf induced in the frame will be proportional to

MCQs-PYQs-12th-jee

A long solenoid of diameter 0.1 m has 2×104 turn per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0A from 4A in 0.05 s. If the resistance of the coil is 10π2Ω, the total charge flowing through the coil during this time is

MCQs-PYQs-12th-jee

A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate dB/dt. Loop 1 of radius R > r encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in the figure below. Then the e.m.f. generated is

MCQs-PYQs-12th-jee

A rectangular loop of wire shown below is coplanar with a long wire carrying current 1. The loop is pulled to the right as indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and the right sides of the loop Induced current Forces on left side Force on right side

MCQs-PYQs-12th-jee

A circular coil of radius R = 10cm having 500 turns and total resistance 22 is placed initially perpendicular to the earth’s magnetic field of 3×10-5T. The coil is rotated about its vertical diameter by an angle 2m in 0.5 seconds. The induced current in the coil is

MCQs-PYQs-12th-jee

A cylindrical bar magnet is rotated about its axis. A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then,

MCQs-PYQs-12th-jee

A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle 20. The earth’s magnetic field component in the direction perpendicular to swing is B. Maximum potential difference induced across the pendulum is

1 2 3 4 5 6

vgyanlogo

Access To All Courses from VgyanHub

Popular Courses

12th Physics | Maharashtra State Board | Full Course
Physics | JEE Main | Full Course
Physics | NEET | Full Course

Company

Home
About Us
Courses
Testimonials
Knowledge Base

Need Some Help?

Contact Us

© Copyright 2024 VgyanHub & Designed by PanGrow Tech Pvt. Ltd.