An analog ammeter able to have a 0.5 A maximum reading is to be built using a small coil of resistance R = 20 ?, and full scale deflection at 1 mA. What resistance should be added to this coil and how should it be connected to the coil?

A)

0.08 ? in parallel
B)

0.5 ? in parallel
C)

0.02 ? in series
D)

20.4 ? in parallel
E)

0.04 ? in parallel


E

Physics & Space Science

You might also like to view...

As material flows into a black hole

a. the material will experience time dilation. b. the material will become hotter. c. the material will produce an absorption spectrum. d. the material will appear to us to fall into the black hole very rapidly. e. a and b

Physics & Space Science

Rotational Kinetic Energy: A futuristic design for a car is to have a large flywheel within the car to store kinetic energy. The flywheel is a solid uniform disk of mass 370 kg with a radius of 0.50 m, and it can rotate up to 200 rev/s. Assuming all of this stored kinetic energy could be transferred to the linear speed of the 1500-kg car, find the maximum attainable speed of the car.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

Two small cylindrical plastic containers with flat bottoms are placed on a turntable that has a smooth flat surface. Canister A is empty; canister B contains lead shot. Each canister is the same distance r from the center. The coefficient of static friction between the canisters and the turntable is ?s. When the speed of the turntable is gradually increased,

a. only the lighter container slides outward off the turntable; the heavier one stays on. b. only the heavier container slides outward off the turntable; the lighter one stays on. c. both containers slide off the turntable at the same turntable speed. d. the lighter container slides inward. e. the heavier container slides inward.

Physics & Space Science

Two important properties of young neutron stars are:

A) extremely slow rotation and a strong magnetic field. B) extremely rapid rotation and a weak magnetic field. C) extremely rapid rotation and a strong magnetic field. D) no rotation and a weak magnetic field. E) no rotation and no magnetic field.

Physics & Space Science