Question

Redraw the circuit diagram of question 2 by connecting an ammeter to a current and a voltmeter across a 120 resistor to measure the voltage, what would be the readings of an ammeter and voltmeter?

Answer 1

Answer:

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Answer 2

ᴀɴsᴡᴇʀ:

ᴡᴇ ᴋɴᴏᴡ, ᴠ = ɪʀ. ᴛʜᴇ ᴘᴏᴛᴇɴᴛɪᴀʟ ᴅɪғғᴇʀᴇɴᴄᴇ ᴠ = 6ᴠ ᴡʜᴇʀᴇ ᴛʜᴇ ᴄᴜʀʀᴇɴᴛ

ɪs ɪ.

ʀᴇsɪsᴛᴀɴᴄᴇ ᴏғ ᴄɪʀᴄᴜɪᴛ ɪs

ʀ = 12 + 5 + 8 = 25 Ω.

ᴀɢᴀɪɴ ɪ = ᴠ/ʀ = 6/25 = 0.24 ᴀᴍᴘᴇʀᴇ.

ʟᴇᴛ ᴛʜᴇ ᴘᴏᴛᴇɴᴛɪᴀʟ ᴅɪғғᴇʀᴇɴᴄᴇ ᴀᴄʀᴏss 12 Ω ʀᴇsɪsᴛᴏʀ = ᴠ1; ᴄᴜʀʀᴇɴᴛ ғʟᴏᴡɪɴɢ ɪs 0.24 ᴀᴍᴘᴇʀᴇ.

ғᴏʟʟᴏᴡɪɴɢ ᴏʜᴍ’s ʟᴀᴡ, ᴡᴇ ɢᴇᴛ ᴠ1=ɪʀ = 0.24 x 12= 2.88 ᴠᴏʟᴛs.

sᴏ ᴛʜᴇ ᴀᴍᴍᴇᴛᴇʀ ᴡɪʟʟ ʀᴇᴀᴅ 0.2ʀ ᴀᴍᴘᴇʀᴇ ᴀɴᴅ ᴛʜᴇ ᴠᴏʟᴛᴍᴇᴛᴇʀ 2.88 ᴠᴏʟᴛs.