A 13-cm-long nichrome wire is connected across the terminals of a 1.5 V battery.

A 0.8 kg block is moving horizontally to the right with a speed of 6 m/s when it strikes a vertical wall. After the collision, the block is moving to the left with a speed of 2 m/s. What is the magnitude of the impulse on the block

In the figure battery 1 has emf 8₁ = 13.0 V and internal resistance r₁=0.041 2 and battery 2 has emf 82= 13.0 V and internal resistance r₂ = 0.015 Q. The batteries are connected in series with an external resistance R. (a) What R value makes the terminal-to- terminal potential difference of one of the batteries zero? (b) Which battery is that? 11 $ 12 816 826

The terminal voltage of a battery is 13.5 v when 5 A current enters its positive terminal, but when a 5 A current leaves its positive terminal, the terminal voltage becomes 11.5 v. Determine the emf and internal resistance of this battery. ɛ = 12 v, r = 0.25 Q ɛ = 12.5 v, r = 0.2 Q ɛ = 12.0 v, r = 0.2 Q ɛ = 12.05 v, r = 2 0

A potentiometer is essentially a resistor with three contacts, one of which is mobile. It acts as a variable resistor, since changing the position of the mobile contact, called the "wiper" (denoted by an arrow), changes the amount of the resistor through which current must pass. The circuit shown consists of one 71.5 V 2680 2, battery, one fixed resistor with resistance R and one potentiometer. In addition, one of the wires is grounded (at zero potential). The resistive material inside the potentiometer has a resistance of 475 Q/mm. To what distance x should the wiper be moved so that 12.8 mA of current passes through point B? X= mm With the wiper in this position, what is the potential at point B? ww: wwww

Two 2.0cm x 2.0cm metal electrodes are spaced 1.4 mm apart and connected by wires to the terminals of a 9.0 V battery.

An uncharged condenser in series a 120-volt voltmeter of 10,000 ohms resistance is suddenly connected to a 100 V battery. One second later, the voltmeter reads 60 volts. Determine the rate at which the voltage across the condenser is charging. Answer.: 51e – 0.51t volts/sec.

Three resistors, R1 = 500 Ω, R2 = 600 Ω and, R3 = 230 Ω, are connected in parallel, and to a 12 V battery to form a closed circuit.  Calculate the total current that would be measured near the battery's positive terminal, before it forks through the separate resistors.

A 260-V emf is connected to the terminals A and B. Here,V = 260V, R1 = 16 Ω, and R2 = 19Ω. What is the equivalent resistance between points A and B? What is the current in the 16-Ω resistor?

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