The d.c. and a.c. both can be measured by hot wire instruments. Why?

In an a.c. circuit, the current

Direction. In the following questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : A transformers are used only with an a.c. source and not with the d.c. source. Reason : Only a.c. can be stepped up or stepped down by means of transformers.

What is blood pressure?(b)What are noraml value of systolic and diastolic blood pressure(c) How is it measured?(d) Name the instrument used to measure blood pressure?

Alternating current cannot be measured by d.c. ammeter because:

In an a.c circuit, the a.c. metres measures?

A 110 V d.c. heater is used on an a.c. source, such that the heat produced is the same. What would be the r.m.s. value of the alternating voltage?

An electric lamp, which runs at 100 volt d.c. and 10 ampere current, is to be run on 220 volt - 50 cycles a.c. mains. Calculate the inductance of the required choke coil.

The division marked on the scale of an a.c. ammeter is not equally spaced. Why?