Blog

A 250-turn solenoid carries a current of 5.0 A. The length of the solenoid is 14 cm. What is the magnetic field inside the solenoid?

A small bird of mass m is sitting on a perch of mass 7 g, which is supported by a magnetic force. The perch is 10 cm long and contains a wire carrying a current of 2.0 A. The perch is oriented at right angles to a uniform magnetic field of 0.9 T that is strong enough to support the perch and the bird. What is the mass of the bird?

The electric field at a point 2.0 cm from a small charged object has a strength of E=160,000 N/C and is directed towards the charge. What is the object’s charge?

A charge +5 

A plastic ball of mass 2.1 g has been charged to 3 nC.  What strength of the electric field will produce an acceleration of 0.5 m/s2 on the ball, if electrostatic force is the only force acting on the ball?

What is the equivalent resistance of the combination of resistors shown in the figure, if each resistor has 10 Ω (ohm) resistance?

A 16-year-old states: “I don’t know who I am anymore. I feel different around every group of friends.” According to Erikson, this adolescent is struggling with:

A PMHNP is conducting a pediatric psychiatric assessment. Which source of information is generally considered most reliable?

Freud’s structural model includes:

A PMHNP is evaluating a 7-year-old child for possible ADHD. Which assessment finding is most consistent with DSM-5-TR diagnostic criteria?