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Which of these materials requires the lowest value of magnetic field strength to magnetize it? (a) Nickel (c) Tungsten (b) Silver (d) Sodium chloride
What is the unit of magnetic charge? (a) Ampere-meter squared (c) Ampere (b) Coulomb (d) Ampere-meter
The resultant force on the circular loop in Figure 8.33 has the magnitude of (a) 2proIB (c) 2roIB (b) pro 2 IB (d) Zero
Two thin parallel wires carry currents along the same direction. The force experienced by one due to the other is (a) Parallel to the lines (b) Perpendicular to the lines and attractive (c) Perpendicular to the lines and repulsive (d) Zero
Two thin parallel wires carry currents along the same direction. The force experienced by one due to the other is (a) Parallel to the lines (b) Perpendicular to the lines and attractive (c) Perpendicular to the lines and repulsive (d) Zero
Which of the following statements are not true about electric force Fe and magnetic force Fm on a charged particle? (a) E and Fe are parallel to each other, whereas B and Fm are perpendicular to each other. (b) Both Fe and Fm depend on the velocity of the charged particle. (c) Both Fe and Fm can perform work. (d) Both Fe and Fm are produced when a charged particle moves at a constant velocity. (e) Fm is generally small in magnitude in comparison to Fe. (f) Fe is an accelerating force, whereas Fm is a purely deflecting force
What is (a) the position, and (b) the size, of the image of a 7.60cm-high object placed 1.00 m from a +50.0-mm-focal-length camera lens?
A 1.50-cm-high object (upright arrow) is placed 20.0 cm from a concave mirror with radius of curvature 30.0 cm. Determine (a) the position & (b) the size of the image. Construct a ray-diagram for the image formation of this object on the concave mirror by using appropriate scale.
Find the critical angle for an air–water boundary. (The index of refraction of water is 1.33.)
Light travelling in air strikes a flat piece of uniformly thick glass at an incident angle of 60.0°, as shown. If the index of refraction of the glass is 1.50, (a) what is the angle of refraction θA in the glass; (b) what is the angle θB at which the ray emerges from the glass?
