Q. A heating element of resistance (at its operating temperature) 534 Ω is connected to a battery of emf 735 V and unknown internal resistance . It is found that heat energy is being generated in the heater element at a rate of 85.0 W. What is the rate at which heat energy is being generated in the internal resistance of the battery?
Q. A particle with a charge of q = -5.10 nC is moving in a uniform magnetic field of vec{B}=( -1.24 T ) hat{z}. The magnetic force on the particle is measured to be vec{F}= ( -7.60×10-7 N )hat{y}.
Calculate the x component of the velocity of the particle.